Understanding Standard Deviation in Performance Testing
Two runs with the same mean can behave completely differently, and this is how you tell. Pair it with percentiles rather than reporting either alone.
Load Testing
All articles, page 10 of 13
Newest first. 300 load testing, JMeter, test automation and monitoring guides, plus tool comparisons. Browse by topic from the blog home.
Test Automation
How to Improve your WordPress Performance Score
Caching plus image optimisation covers the majority of the available gain. Audit plugins periodically. Each one adds queries and assets to every page.
Apache JMeter
Which is the Execution Order of Elements in Apache JMeter?
JMeter runs elements in a fixed order: config, pre-processors, timers, samplers, post-processors, assertions, listeners. The rules that trip people up.
Cloud Testing
Agile Software Release Checklist Manifesto
Releasing often only works if the pre-release checks are automated and identical every time.
Apache JMeter
Record and Run JMeter Load Tests in the Cloud: Ultimate Chrome Extension for Performance Testing
Recording in the browser captures the real request sequence including headers you would otherwise miss.
Apache JMeter
Which language is used in JMeter?
JMeter is written in Java and needs a JRE. Test plans are XML; in-test scripting uses Groovy (JSR223), Beanshell or JavaScript. What that means for you.
Apache JMeter
How does Apache JMeter work?
JMeter builds a test plan of thread groups and samplers, then runs it as concurrent Java threads.
Apache JMeter
Where to find the configuration files for JMeter when installed with Homebrew?
Use brew –prefix to locate the install rather than guessing the path. Edit the properties file there, and remember an upgrade can replace it.
Apache JMeter
How to Increase Heap Size in JMeter?
JMeter defaults to a small heap, which causes out-of-memory failures on large tests.
Apache JMeter
How to Install Plugins using the JMeter Plugin Manager
The Plugins Manager handles dependencies, which manual jar copying does not. Install it once, then add and update plugins from inside JMeter.
Apache JMeter
Why does installing JMeter with Homebrew gives invalid option: –with-plugins?
The with-plugins option was removed when Homebrew dropped formula options. Install JMeter first, then add plugins with the JMeter Plugins Manager.
Apache JMeter
How to Install JMeter on Mac?
Install Apache JMeter on macOS with Homebrew or the archive, fix the Java version, and start it from the terminal. Then run the same script in the cloud.
Test Automation
Cypress: The Web Testing Framework of the Moment
Cypress runs in the browser alongside your app, which makes debugging far more direct.
Test Automation
Using Selenium IDE Record and Playback tool
Selenium IDE is the fastest way to capture a journey, and the worst way to maintain one. Use it to draft a test, then export and clean up the locators.
Test Automation
Using TestCafe for End to End Testing
TestCafe runs without WebDriver, which removes most of the setup friction. End to end tests are expensive, so keep them to the journeys that matter.
Test Automation
Chrome Extension for Google Lighthouse as a service
Running Lighthouse from an extension gives you an audit without leaving the page you are testing.
Test Automation
What is First Meaningful Paint (FMP)?
FMP tried to capture when the main content appeared, rather than the first pixel. Use LCP for anything current; FMP appears mainly in older reports.
Load Testing
What is Disaster Recovery Testing in Software Testing?
A recovery plan that has never been executed is an assumption, not a plan. Test the restore, not just the backup; backups fail silently at restore time.
Load Testing
What is Stress Testing in Software Testing?
Stress testing pushes past expected load to find the breaking point and the failure mode. How the system recovers matters as much as where it broke.
Test Automation
End to End Testing for Asos.com using TestCafe in Under 30 minutes
TestCafe needs no WebDriver, which is why a working suite is possible in half an hour.
Test Automation
Best Practices for Implementing E2E (End-to-End) UI Tests
E2E tests earn their cost only on the journeys that make money; everything else belongs lower in the pyramid.
Test Automation
Building your in house Device Farm on Mac OS using OpenSTF for Android Testing
OpenSTF gives you remote access to real Android devices, which emulators cannot fully replace.
Test Automation
How to Design Effective Load Testing Scenarios
Include think time. Removing it produces a load pattern no user creates. Start below expected peak and ramp, so you can see where behaviour changes.
Test Automation
How to Click on Element with Puppeteer and Chrome
Puppeteer's click waits for the selector, but not for the element to be genuinely interactive.
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